From 5a1e1c62f37e83657b570953cab9855f17fcbc7d Mon Sep 17 00:00:00 2001 From: Josh Zimmerman Date: Sun, 25 Jun 2017 14:53:23 -0700 Subject: [PATCH] Add "shutdown" to "struct class". commit f77af15165847406b15d8f70c382c4cb15846b2a upstream. The TPM class has some common shutdown code that must be executed for all drivers. This adds some needed functionality for that. Signed-off-by: Josh Zimmerman Acked-by: Greg Kroah-Hartman Fixes: 74d6b3ceaa17 ("tpm: fix suspend/resume paths for TPM 2.0") Reviewed-by: Jarkko Sakkinen Tested-by: Jarkko Sakkinen Signed-off-by: Jarkko Sakkinen Signed-off-by: James Morris Signed-off-by: Greg Kroah-Hartman --- drivers/base/core.c | 6 +++++- include/linux/device.h | 2 ++ 2 files changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/base/core.c b/drivers/base/core.c index ce057a5..03a82d0 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -2095,7 +2095,11 @@ void device_shutdown(void) pm_runtime_get_noresume(dev); pm_runtime_barrier(dev); - if (dev->bus && dev->bus->shutdown) { + if (dev->class && dev->class->shutdown) { + if (initcall_debug) + dev_info(dev, "shutdown\n"); + dev->class->shutdown(dev); + } else if (dev->bus && dev->bus->shutdown) { if (initcall_debug) dev_info(dev, "shutdown\n"); dev->bus->shutdown(dev); diff --git a/include/linux/device.h b/include/linux/device.h index bc41e87..8d73296 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -373,6 +373,7 @@ int subsys_virtual_register(struct bus_type *subsys, * @suspend: Used to put the device to sleep mode, usually to a low power * state. * @resume: Used to bring the device from the sleep mode. + * @shutdown: Called at shut-down time to quiesce the device. * @ns_type: Callbacks so sysfs can detemine namespaces. * @namespace: Namespace of the device belongs to this class. * @pm: The default device power management operations of this class. @@ -401,6 +402,7 @@ struct class { int (*suspend)(struct device *dev, pm_message_t state); int (*resume)(struct device *dev); + int (*shutdown)(struct device *dev); const struct kobj_ns_type_operations *ns_type; const void *(*namespace)(struct device *dev); -- 2.7.4